Oh Verdun! Been there and done that! Or very similar - but our trip involved a 50mile midnight train journey, only to discover that all was now well - so we went back to the station and got a train home .... they do grow out of it, eventually

How's that Sedum Spectabile you bought this year from Notcutts? Mine has done really really well but now looks a very poor specimen, with hardly a leaf on it. I'm going to try to take some cuttings from whatever leaves I can find.

Unless you have good reason to think that their current postions are unsuitable for them, I'd leave them where they are. I suspect that they've been busy establishing a good root system in their first season in your garden, and that next year they'll put on a much better show for you.

Give them a good mulching with organic material this autumn, and feed with Fish Blood and Bone in February when you prune them.

The warm damp weather has encouraged lots of fungal 'infections' this autumn - my guess is that it's something of that sort. I'd pick off the worst affected leaves and hopefully when the weather cools down the problem will be gone.